Olivier Giroud is expected to lead Arsenal's attack against Monaco in the Champions League tieGetty

Arsenal striker Olivier Giroud has revealed Arsenal's coaching staff want him to show the "killer" attitude of Chelsea's Diego Costa.

The France international has been in excellent form since returning to action from a serious injury that left him on the sidelines during much of the first part of the season.

Giroud has scored eight Premier League goals in just 10 starting appearances this season – 15 in total – and recently netted a brace in the FA Cup victory over Middlesbrough.

Arsenal manager Arsene Wenger has praised the striker's recent form and claims that even though he is finally proving his worth in the Premier League, Giroud still has room for improvement.

"[Between] when I brought him here, and [when] you look at him today, I think there's a hell of a difference. That's credit to him - to the player he was and the player he is today, plus credit for his whole season, where he has worked very hard. I think there's still room for improvement for him," Wenger said after his latest goal in the 2-1 victory over Crystal Palace on 21 February.

Giroud has claimed during an interview with L'Equipe that he has already improved his physical power at the gym and now Arsenal's coaching staff want him to work on the psychological aspect to emulate Costa's killer attitude.

"When [I put my hands on my head] after a missed chance, the coaches get a bit annoyed. They want me to have a 'killer' attitude, almost insensitive. Diego Costa shows no emotion. I am more emotional. I have therefore learned to control my emotions. I try to be less demonstrative," the French star said regarding the Chelsea striker, who has scored 17 Premier League goals since his £32m ($50m) move from Atletico Madrid in the summer of 2014.

"With age, you get a little bit cleverer. I have learned from my mistakes. I have changed my habits, my way of training. I do a little bit more gym work and muscle work. I weigh one or two kilos more. I am gained in explosivity and I am more mobile."